342 AMERICAN PACHYBRACHYS (cOLEOPTERA) 



Length 2.5 to 3 mm.; width 1.35 to 1.65 mm. 



Distribution. — California: San Diego, May 1 to June 1; Los Angeles Co. 

 (Coquillett in Nat. Mas. Coll.); Pasadena. Type from San Diego (Bowditch 

 Coll.). 



There is very little variation in color of upper surface in this 

 species, but a considerable amount in punctuation of the elytra. 

 In some specimens the diffusion is almost complete, but in most 

 examples the submarginal (eighth) stria is fairly regular, as are 

 often the seventh and the terminal portions of others, no two 

 specimens, however, being quite alike. The punctures of the 

 marginal interspace are variable in number, but extend through- 

 out its length and are scarcely different in size from those of the 

 submarginal stria, with which they are often confused. 



23. Pachybrachys punctatus Bowditch. 



Flavo- to rufo-testaceous, finely alutaceous and moderatel}^ 

 or feebly shining; frontal marks small, prothorax with faint 

 diffuse livid or pale brown clouds, elytra either immaculate or 

 with some or all of the standard spots indicated, punctures brown, 

 largely diffuse, sutural edge blackish; ocular lines fine, usually 

 quite close to the eyes; front claws of male distinctly enlarged. 

 Ave. length 3.2 mm. California. 



Head moderately, but unevenly punctate; eyes not prominent, separated by 

 from rather less than one and one-half to about one and three-fourths times 

 the length of the basal antennal joint in the male and by a little more than 

 twice the basal joint in the female. Antennae very slender, attaining or 

 slightly passing the middle of the ejj^ra in the male, shorter in the female, 

 yellow basally, dusky beyond the middle. 



Prothorax not very strongly transverse in the male, moderately so in the 

 female, sides narrowed in front, broadly subangulate posteriorly and a little 

 convergent before the basal angles; not very thickly, somewhat unevenly 

 punctate, side margins narrowly smoother. 



Elytra broadly diffusely punctate on the disk, one or two of the lateral striae 

 more or less distinct — especially in the male — but scarcely at all impressed, the 

 punctures also becoming subserial on the declivity; marginal interspace 

 punctured throughout its length as a rule (rarely with but few punctures), 

 and in the female the punctures are usually confused with those of the sub- 

 marginal stria; elytral shield wanting or but faintly indicated. 



Pygidium pale, the base, from which projects a median spur, and a small 

 spot each side blackish. 



Body beneath varying from entirely pale to almost entirely blackish. Legs 

 pale, the hind femora often with small median spot. 



Length 2.8 to 3.G mm.; width 1.1 to 1.9 mm. 



